Btjrglak-alabm



G. W. BIGELOW; Burglar Alarm.

Patented April 10, 1860 I &m m.

Lithographer. Washington 0. a

v of a door with my alarm applied to it. Fig.

from one of said jaws, so that when the door UNITED STATES PATENTOFFICE.

GEO. W. BIGELOW, OF NEW HAVEN, CONNECTICUT.

BURGLAR-ALARIVL Specification of Letters Patent No. 27,772, dated April10, 1860.

To all whom it may concern:

Be it known that I, Gno. W. BIGELOW, of New Haven, in the county of NewHaven and State of Connecticut, have invented a new and ImprovedBurglar-Alarm; and I do hereby declare that the following is a full,clear, and exact description of the same, reference being had to theaccompanying drawing, forming a part of this specification, in whichFigure 1, represents a horizontal section 2, is a plan or top View of myinvention.

Similar letters of reference in both views indicate corresponding parts.

This invention consists in arranging two pivoted jaws in combinationwith a spring in such relation to each other that the tapering end ofone of the jaws, can be depressed into-a slot in the end of the otherjaw, and that both together, when thus com aressed can be inserted intothe crack of a coor or window up to a shoulder which projects is opened,one of the jaws strikes against a nipple attached to the other one, andby eX ploding a cap placed on said nipple frightens the burglar andarouses the inmates of the house.

To enable those skilled in the art to make and use my invention I willproceed to describe its construction and operation with reference to thedrawing.

Two aws A B, are connected by a pivot a, and a s ring O, which isconnected to the jaw B, forces the ends 0, and (Z, of the two jawstogether. A nipple e, is secured in the end d, of the jaw B, and the end0, of the jaw A, forms a hammer which by striking against the nippleexplodes a cap that may be placed on the same. The other ends 7 and g,of both the jaws are tapering, and the end 9, of the jaw B, is slottedso that the tapering end of the aw A, can be depressed into the same asclearly shown in Fig. 1, in the drawing. When thus compressed both ens fandg, of the jaws together are inserted into the crack of a door orwindow and a shoulder h, on the aw B, bears against the door or window.In applying my invention to a door, care must be taken to have theshoulder bear against the door and not against the case or frame, andwhen applied to a window which slides up, the shoulder ought to rest onthe frame of the inner sash. A percussion cap is now placed on thenipple e, and the alarm is ready for operation.

If the door or window is pushed open, the tapering ends of the jaws aredisengaged from the crack and the hannner c, of the jaw A, is broughtdown with considerable force on the nipple. The cap explodes and thenoise frightens the burglar if such a person attempted to enter theroom, and the inmates of the house or room are aroused. The simplicityof this alarm and its compactness are unsurpassed, it can easily becarried in the pocket, and it is of peculiar advantage to travelers whenstopping in hotels, so as to prevent dishonest persons from enteringtheir rooms at night.

That I claim as new, and desire to secure by Letters Patent, is

The arrangement of the pivoted jaws A, B, with the tapering ends f, g,and with the hammer c, and nipple e, in combination with the spring C,constructed and operating substantially as and for the purposedescribed.

GEORGE lV. BIGELOlV. lVitnesses H. B. BIGELOW, CHARLES Ivns.

